Source : Webster's Revised Unabridged Dictionary (1913)

Rustic \Rus"tic\, n.
   1. An inhabitant of the country, especially one who is rude,
      coarse, or dull; a clown.

            Hence to your fields, you rustics! hence, away.
                                                  --Pope.

   2. A rural person having a natural simplicity of character or
      manners; an artless, unaffected person. [Poetic]

Rustic \Rus"tic\, a. [L. rusticus, fr. rus, ruris, the country:
   cf. F. rustique. See {Rural}.]
   1. Of or pertaining to the country; rural; as, the rustic
      gods of antiquity. ``Rustic lays.'' --Milton.

            And many a holy text around she strews, That teach
            the rustic moralist to die.           --Gray.

            She had a rustic, woodland air.       --Wordsworth.

   2. Rude; awkward; rough; unpolished; as, rustic manners. ``A
      rustic muse.'' --Spenser.

   3. Coarse; plain; simple; as, a rustic entertainment; rustic
      dress.

   4. Simple; artless; unadorned; unaffected. --Pope.

   {Rustic moth} (Zo["o]l.), any moth belonging to {Agrotis} and
      allied genera. Their larv[ae] are called cutworms. See
      {Cutworm}.

   {Rustic work}.
      (a) (Arch.) Cut stone facing which has the joints worked
          with grooves or channels, the face of each block
          projecting beyond the joint, so that the joints are
          very conspicuous.
      (b) (Arch. & Woodwork) Summer houses, or furniture for
          summer houses, etc., made of rough limbs of trees
          fancifully arranged.

   Syn: Rural; rude; unpolished; inelegant; untaught; awkward;
        rough; coarse; plain; unadorned; simple; artless;
        honest. See {Rural}.

Source : WordNet®

rustic
     adj 1: characteristic of rural life; "countrified clothes"; "rustic
            awkwardness" [syn: {countrified}, {countryfied}]
     2: awkwardly simple and provincial; "bumpkinly country boys";
        "rustic farmers"; "a hick town"; "the nightlife of
        Montmartre awed the unsophisticated tourists" [syn: {bumpkinly},
         {hick}, {unsophisticated}]
     3: used of idealized country life; "a country life of arcadian
        contentment"; "a pleasant bucolic scene"; "charming in its
        pastoral setting"; "rustic tranquility" [syn: {arcadian},
        {bucolic}, {pastoral}]
     4: characteristic of the fields or country; "agrestic
        simplicity"; "rustic stone walls" [syn: {agrestic}]

rustic
     n : an unsophisticated country person